不同浓度Cu对小白菜生理生化特性的影响  

The Effects of Cu Treatment on the Physiological and Biochemical Characters of Brassica campestris ssp. chinensis

作　　者：贾月慧[1] 张泽[1] 李小凡[1] 周阳[1] 王淑娟[1] 王志忠[1] 

机构地区：[1]北京农学院植物科学技术学院/农业应用新技术北京市重点实验室,北京102206

出　　处：《中国农学通报》2014年第1期209-214,共6页Chinese Agricultural Science Bulletin

基　　金：北京市教育委员会科研项目"禽畜粪肥的施用对京郊蔬菜及种植基地重金属积累的影响"(KM201010020007);北京市委组织部项目"畜禽粪肥的施用对京郊设施蔬菜及其土壤重金属富集研究"(PYZZ090423001829);北京市教育教学改革立项--本科生研究训练项目(PXM2013-014207-000029)

摘　　要：通过模拟盆栽试验,研究不同浓度Cu对小白菜生物量、Cu的积累量和叶绿素含量、细胞膜透性、还原糖含量、过氧化氢酶(CAT)、硝酸还原酶(NR)活力等生理生化指标的影响,为蔬菜安全种植以及重金属污染的科学诊断提供理论依据。结果表明,低浓度的Cu(25 mg/kg)可显著增加小白菜的鲜重,当Cu浓度超过100 mg/kg时,小白菜的地上部分和地下部分的生物量都有明显的下降;Cu在小白菜体内主要富集在地下部分,特别是在高铜条件下;叶绿素含量和NR的活性都随Cu浓度的升高,先升高后直线下降;细胞膜透性、还原糖的含量以及CAT活性则呈现出先略下降后升高的趋势。By pot experiments,this paper studied the effects of Cu pollution on the biomass,the accumulation of Cu,content of chlorophyll,membrane permeability,the content of catalase（CAT）,nitrate reductase（NR） of Brassica campestris ssp.chinensis in order to supple a scientific and theoretical evidence for vegetable safely planted and diagnosing the heavy metal pollution.The result showed that,the biomass of Brassica campestris ssp.chinensis was evidently increased under low concentration of Cu.When concentration of Cu was over 100 mg/kg,the biomass of the ground and underground parts were decreased.At the same time the accumulation of Cu in roots was much higher than those in leaves and stems,special in the high Cu condition.Content of chlorophyll and activity of NR first increased,then decreased with increasing concentration of Cu.However,membrane permeability,content of reducing sugar and activity of CAT showed an opposite trend.

关 键 词：铜 小白菜 生理生化特性 

分 类 号：Q945[生物学—植物学]